Ionization-potential depression and dynamical structure factor in dense plasmas
Ionization-potential depression and dynamical structure factor in dense plasmas
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DOI：
10.1103/physreve.96.013202
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发表时间：
2017-07-06
影响因子：
2.4
通讯作者：
Reinholz, Heidi
中科院分区：
文献类型：
--
作者：
Lin, Chengliang;Roepke, Gerd;Reinholz, Heidi
浸没在等离子体环境中的束缚电子系统的特性会受到周围等离子体的强烈改变。基本量（电离能）的修改由电子和离子自能描述，包括量子统计理论框架内的动态筛选。引入离子动力学结构因子作为离子微场的指标，我们证明离子相关性和波动在确定电离势降低中起着关键作用。对于质量和电荷不对称性较大的不同离子的混合物尤其如此。计算了高密度铝等离子体和 CH 等离子体的电离势降低，并与实验数据和迄今为止使用的更多现象学方法进行了比较。
The properties of a bound electron system immersed in a plasma environment are strongly modified by the surrounding plasma. The modification of an essential quantity, the ionization energy, is described by the electronic and ionic self-energies, including dynamical screening within the framework of the quantum statistical theory. Introducing the ionic dynamical structure factor as the indicator for the ionic microfield, we demonstrate that ionic correlations and fluctuations play a critical role in determining the ionization potential depression. This is, in particular, true for mixtures of different ions with large mass and charge asymmetry. The ionization potential depression is calculated for dense aluminum plasmas as well as for a CH plasma and compared to the experimental data and more phenomenological approaches used so far.